ellacott



(No Mouel.)

C. R. ELLAGOTT.

MACHINE FOR PORGING HORSESHOBNAILS. N0. 257,3(3 2. Patented May 2,1882.

NA PETERS. Phuloulhcgnpher, Wnhingiom 04 r;

UNITED STATES ATENT 'rrren,

CHARLES R. ELLACOTT, OF MONTREAL, QUEBEC, UANADA..

MACHINE FoR FORGING HORSESHOE-NAILS.

SPECIFICATION forming part of Letters Patent No. 257,302, dated May 2,1882.

Application filed September 19, 1881, (No model.)

and I do hereby declare that the following is a full, clear, and exactdescription of the same.

This invention relates to improvements in" that class of machines forforging horseshoenails in which the same are wrought from a rod or bar;and it has for its object to insure a steadier and more positive actionin the mechhanism which feeds the barforward to the anvil and dies wherethe nail is formed, so that there will be less wear and tear of theparts and always a certainty of the nails being forged to an even lengthof head.

It must be understood that while my improvements are represented asapplied to a Dodge machine, they will be equally suitable for any of theimproved machines now in use. In the present machines a large flatsingle or double spring having its lower end attached to a cross-bar inthe front of the frame and its upper extremity bearing upon an armimpinging on a cam and projectingfrom the rockshaft, from whichreciprocating motion is imparted to the carriage upon which the rod islaid, is used to keep said arm close up against the cam whichcommunicates motion to said rock-shaft. This I have found to be veryobjectionable, from the fact that when the carriage has brought the barforward to the anvil and while the nail is being formed this spring isrelaxed, and has not sufficientforce or strength to keep the partssteady enough to insure the accurate forging of the nail, and when thatpart of the cam known as the jerk is reached there is always a certainamount of inaccuracy, which often allows the roll on the rock-shaft armto jump over some distance or not follow closely the 'contounof the camby any increase of speed, and thereby the rod is liable to become bentor crooked, and necesearily an imperfect nail is formed.

Now, by my invention the necessity for this spring and the objectionsarising from its use are done way with. I provide the rock-shaft,

which through an arm actuates the sliding carriage, with an additionalarm projecting about at right angles to the present arm' toward thecenter of the machine, and having mounted on its outer end a smallroller, which impinges upon a cam which I mount on the same shaft, andarrange to rotate simultaneously with the ordinary cam operatingtherockshaft. This supplementary cam is of such configuration that when theordinary cam presents its shortest side to the roller on theupwardlyprojecting arm the impact will be perfectly close and beyond anyliability of loosening, from the fact of the longest side of thesupplementarycam being then in contact with the roll on the additionalarm. I

For full comprehension of my invention reference must be had to theaccompanying drawings, in which similar letters of referenee'indicatelike parts, and. where Figure l is aplan showing the outline of a Dodgemachine with my improvements applied; Fig.2, afront view of the same,and Figs. 3 and 4 details of cams and arms actuated thereby.

A is the rock-shaft, extending across the front of the machineand'working in centers fitted in same. This rock-shaft is providedflwiththe ordinary arm, B, which is attached to and actu'ates the slidingcarriage B, 0 being another arm, attached, as usual, to the samerock-shaft,

its upper end being provided with a roller, 0,-

which impinges againstthe periphery of a-cam,

D, mounted on a horizontal shaft, E, said shaft being rotated by powercommunicated through a train of gears, F F, from the main or drivingshaft G in the usualway. As will be seen;

be described obviates any chance of the roller 0 jumping over the cavityd, since the former is always held perfectly tight against the pcripheryof the cam D during its whole revolu-v tion.

In addition to the arms B and O, I mount firmly on the rock-shaft A,about at right angles to (J, an arm, H, its outer extremity beingprovided with a roller, h. This arm H is formed, preferably as shown inFig. 3, with a hinge, i, It being a spring or other device which willserve to adjust the roller and compensate for wear. The roller himpinges against the a periphery of a supplementary cam, K, which I theshaft E is bearing on the roller on the arm 0 the part of the peripheryof the supplementary cam K'which is farthest from the center of E willimpinge on the roller h of the arm H, and vice versa, thus keeping theparts close in to one another and insuring accurate and positive motionthroughout the entire revolution of the cam D, and enabling the machineto be run at a much higher rate of speed and with less power than arerequired for any other machine on the Dodge principle now in use; andthus the quantity of nails produced will be much greater in proportionto the increased rate of speed.

As shown in Figs. 3 and 4, I mount upon the side of the supplementarycam K a piece, forming the segment of a circle, that portion of itsperiphery which the projection from the cutter-shaft M first strikesagainst being slightly eccentric; and before the lump or projection L(shown more particularly in Fig. 3) is reached a friction'roll, Z,mounted on the end of the projection from the cutter-shaft, commences torevolve, and the proper rate of speed relative to the difference intheir diameters is attained thereby. When the throw takes place by theprojection L coming in contact with the roll I the cutting-jaw receivesits right amount of travel without any danger of an overthrow takingplace, even when the machine is run at avery high rate of speed, thisdefect being from the foregoing and from-the drawings that I obtain amuch steadier and more positive motion and one requiring less power bythe arrangement of my supplementary cam,in combination with the presentrock and cutter shafts and by the abolition of the large spring andwiper, than can be produced by'the old methods.

I am aware that cams are very generally used to give positive motion toreciprocating parts of machines for the manufacture of bolts and nuts,850., and also that'in the Patent No. 224,062, granted to Wills,February 3, 1880, a double system of cams is shown for positivelyoperating a rock-shaft, an armprojecting from which actuates theslide-plateof a nail-finishing machine.

I am also "cognizant of*th-fa ct =that in Oehmes patent, No. 120,088,October'17f187l, a pivoted lever-havinga small roller ataitsend workingbetween two cams, each on-separate shafts, and a-similar lever withrolleracting on the under side of the lower cam a'li'dkept up againstitby a spiral spring, are used'for operating the dies of ahorseshoe-machine.

I wish it also to be-understood that Ifdo not claim any of the parts ordevices shown. in Dodges patent, No. 2 5,183, August'23,'1859, as myinvention, as already explained, is to overcome theinaccuracyhereto'tbre found in the working of this Dodge machine, witha.

view to lessening the wear and tear. and turn out a more perfect nailwhile the machine is running at a greater speed and with less power thanheretofore.

What I claim, and'desire'to secure by: Letters Patent, is as follows:

In a machineforforging horseshoe-n'ails, the combination,with therock-shaft A,the arm 0, and the cam D, mounted on the shaft E, of asupplementary cam, K, also mounted onQthe shaft E, and an arm, H, hingedat i to; the rock-shaft A approximately at right; angles to the arm G,provided with a roller, h, workin g on the periphery of saidcai'nK,andl'adjusting device k, substantially as and for the purpose setforth.

. CHARLES nice ELIIA'GOTT.

Witnesses:

J. A. RENNIE, R. AR'IHUR KELLoND.

